WO2015133602A1 - Électrofiltre et climatiseur utilisant celui-ci - Google Patents

Électrofiltre et climatiseur utilisant celui-ci Download PDF

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Publication number
WO2015133602A1
WO2015133602A1 PCT/JP2015/056636 JP2015056636W WO2015133602A1 WO 2015133602 A1 WO2015133602 A1 WO 2015133602A1 JP 2015056636 W JP2015056636 W JP 2015056636W WO 2015133602 A1 WO2015133602 A1 WO 2015133602A1
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WO
WIPO (PCT)
Prior art keywords
electrode
air
dust
airflow
air filter
Prior art date
Application number
PCT/JP2015/056636
Other languages
English (en)
Japanese (ja)
Inventor
俊 岩野
大樹 奥野
Original Assignee
株式会社富士通ゼネラル
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2014045683A external-priority patent/JP6012652B2/ja
Priority claimed from JP2014045682A external-priority patent/JP6012651B2/ja
Application filed by 株式会社富士通ゼネラル filed Critical 株式会社富士通ゼネラル
Priority to EP15758131.5A priority Critical patent/EP3115113A4/fr
Priority to US15/112,335 priority patent/US20160332169A1/en
Priority to CN201580006003.9A priority patent/CN105934279B/zh
Publication of WO2015133602A1 publication Critical patent/WO2015133602A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/04—Plant or installations having external electricity supply dry type
    • B03C3/12—Plant or installations having external electricity supply dry type characterised by separation of ionising and collecting stations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/04—Plant or installations having external electricity supply dry type
    • B03C3/09—Plant or installations having external electricity supply dry type characterised by presence of stationary flat electrodes arranged with their flat surfaces at right angles to the gas stream
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/32—Transportable units, e.g. for cleaning room air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/36—Controlling flow of gases or vapour
    • B03C3/368—Controlling flow of gases or vapour by other than static mechanical means, e.g. internal ventilator or recycler
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/40—Electrode constructions
    • B03C3/41—Ionising-electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/40—Electrode constructions
    • B03C3/45—Collecting-electrodes
    • B03C3/47—Collecting-electrodes flat, e.g. plates, discs, gratings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/192—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by electrical means, e.g. by applying electrostatic fields or high voltages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/30—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by ionisation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Definitions

  • the present invention relates to an electrostatic precipitator and an air conditioner using the same.
  • the electrostatic precipitator has a discharge electrode (charging electrode) and a dust collecting part.
  • the discharge electrode discharges upstream of the airflow with respect to the dust collection portion. Dust in the airflow is charged according to the discharge. The charged dust adheres to a dust collecting portion including a flat dust collecting electrode and a high voltage high voltage electrode.
  • a dust collecting portion including a flat dust collecting electrode and a high voltage high voltage electrode.
  • a flat plate-shaped dust collecting electrode and a high voltage electrode are arranged in parallel to the air flow direction.
  • the dust collecting electrode and the high voltage electrode are opposed to each other, and an electric field is generated between the two electrodes.
  • the path of the charged dust is bent by the Coulomb force received from the electric field generated between the dust collection electrode and the high voltage electrode. Dust adheres to the dust collection electrode.
  • the high-pressure electrode is disposed close to the dust-collecting electrode, while the airflow path defined by the dust-collecting electrode and the high-pressure electrode must be sufficiently long in the flow direction of the airflow. .
  • the ventilation resistance is increased.
  • an electrostatic precipitator that can reduce ventilation resistance and increase the efficiency of dust collection.
  • One aspect of the present invention is a charging electrode that is disposed in an air stream and discharges the air stream to charge a substance such as dust in the air stream, and is disposed downstream of the charging electrode along the flow direction of the air stream.
  • a dust collecting electrode formed of a conductive material partitioning the air flow passage; and the charging electrode disposed downstream of the dust collecting electrode along the air flow direction and intersecting the air flow direction;
  • the present invention relates to an electrostatic precipitator including a repulsive electrode that forms an electrical barrier of the same polarity.
  • the electric dust collector constitutes a part of the dust collecting electrode, receives the airflow on a first surface, and supports the conductive material on a second surface opposite to the first surface;
  • a repulsion electrode is disposed downstream of the dust collection electrode, and the conductive material on the repulsion electrode faces the conductive material on the dust collection electrode.
  • the conductive material of the dust collecting electrode and the conductive material of the repulsive electrode are arranged between the first insulator and the second insulator. The user can be prevented from coming into direct contact with the conductive material supplied with the high voltage from the outside.
  • the dust collection electrode may be formed of a mesh sheet and have a conductive material on at least a second surface opposite to the first surface that receives the airflow.
  • the spread of the opening can be set larger than the length of the flow path of the air flow.
  • the electric dust collector can capture fine particles effectively while avoiding pressure loss.
  • the repulsive electrode may include a conductive material that is formed of a mesh sheet and forms the barrier along at least a surface of the dust collecting electrode facing the conductive material. Similarly, the pressure loss of the mesh sheet of the repelling electrode is significantly suppressed. The electric dust collector can capture fine particles effectively while avoiding pressure loss.
  • the mesh sheet of the dust collecting electrode may be formed of an insulating material, and the insulating material may be disposed on the second surface of the dust collecting electrode.
  • a repulsion electrode is disposed downstream of the dust collection electrode, and the conductive material on the repulsion electrode faces the conductive material on the dust collection electrode.
  • the conductive material of the dust collection electrode is covered from the outside with the insulating material. The user can be prevented from coming into direct contact with the conductive material supplied with the high voltage from the outside.
  • the mesh sheet of the repelling electrode may be formed of an insulating material, and the insulating material may be disposed on a surface opposite to the surface facing the dust collecting electrode by the repelling electrode.
  • the conductive material of the dust collecting electrode and the conductive material of the repulsive electrode are arranged between the insulating materials. The user can be prevented from coming into direct contact with the conductive material supplied with the high voltage from the outside.
  • the dust collecting electrode may be connected to the ground.
  • the charge of the fine particles moves to the dust collection electrode.
  • the charge flows to ground.
  • the dust collection electrode avoids the formation of a potential having the same polarity as the charging electrode. Even if the adhesion amount of fine particles increases, new fine particles can surely adhere to the dust collecting electrode. If there is no escape route for the charge on the dust collection electrode, a potential of the same polarity as that of the charging electrode is generated on the dust collection electrode as the amount of charge adhering increases. Adhesion is hindered.
  • the repulsive electrode be opposed to the dust collecting electrode at equal intervals.
  • the electrical barrier can suppress the bias of the potential distribution as much as possible.
  • the fine particles can uniformly adhere to the dust collecting electrode.
  • the electric dust collector as described above can be used by being incorporated in an air conditioner. In this way, the air purifying function can be realized by the air conditioner.
  • the electric dust collector may be used by being incorporated in an air purifier or a ventilator. Such an electric dust collector may be used in a clean room.
  • the efficiency of dust collection can be realized.
  • FIG. 6 is a cross-sectional view taken along line AA in FIG. 5. It is an expansion vertical sectional view of the main part of an indoor unit. It is an expanded sectional view showing roughly the principle of electric dust collection concerning the present invention. It is a disassembled perspective view which shows roughly the structure of the air cleaner which concerns on one Embodiment of this invention.
  • FIG. 1 schematically shows a configuration of an air conditioner 11 according to an embodiment of the present invention.
  • the air conditioner 11 includes an indoor unit 12 and an outdoor unit 13.
  • the indoor unit 12 is installed in an indoor space in a building, for example.
  • the indoor unit 12 may be installed in a space corresponding to the indoor space.
  • An indoor heat exchanger 14 is incorporated in the indoor unit 12.
  • the outdoor unit 13 includes a compressor 15, an outdoor heat exchanger 16, an expansion valve 17, and a four-way valve 18.
  • the indoor heat exchanger 14, the compressor 15, the outdoor heat exchanger 16, the expansion valve 17 and the four-way valve 18 form a refrigeration circuit 19.
  • the refrigeration circuit 19 includes a first circulation path 21.
  • the first circulation path 21 connects the first port 18a and the second port 18b of the four-way valve 18 to each other.
  • a compressor 15 is provided in the first circulation path 21.
  • the suction pipe 15a of the compressor 15 is connected to the first port 18a of the four-way valve 18 via a refrigerant pipe.
  • the gas refrigerant is supplied to the suction pipe 15a of the compressor 15 from the first port 18a.
  • the compressor 15 compresses the low-pressure gas refrigerant to a predetermined pressure.
  • the discharge pipe 15b of the compressor 15 is connected to the second port 18b of the four-way valve 18 via a refrigerant pipe. Gas refrigerant is supplied from the discharge pipe 15 b of the compressor 15 to the second port 18 b of the four-way valve 18.
  • the refrigerant pipe may be a copper pipe, for example.
  • the refrigeration circuit 19 further includes a second circulation path 22.
  • the second circulation path 22 connects the third port 18c and the fourth port 18d of the four-way valve 18 to each other.
  • the outdoor heat exchanger 16, the expansion valve 17, and the indoor heat exchanger 14 are incorporated into the second circulation path 22 in order from the third port 18c side.
  • the outdoor heat exchanger 16 exchanges thermal energy between the refrigerant passing therethrough and the surrounding air.
  • the indoor heat exchanger 14 exchanges heat energy between the refrigerant passing therethrough and the surrounding air.
  • the second circulation path 22 may be formed by a refrigerant pipe such as a copper pipe.
  • a blower fan 23 is incorporated in the outdoor unit 13.
  • the blower fan 23 ventilates the outdoor heat exchanger 16.
  • the blower fan 23 generates an air flow according to the rotation of the impeller, for example.
  • the airflow passes through the outdoor heat exchanger 16.
  • the flow rate of the airflow passing through is adjusted according to the rotational speed of the impeller.
  • a blower fan 24 is incorporated in the indoor unit 12.
  • the blower fan 24 ventilates the indoor heat exchanger 14.
  • the blower fan 24 generates an air flow according to the rotation of the impeller.
  • Indoor air is sucked into the indoor unit 12 by the action of the blower fan 24.
  • the indoor air passes through the indoor heat exchanger 14 and exchanges heat with the refrigerant.
  • the heat-exchanged cold air or warm air flow is blown out from the indoor unit 12.
  • the flow rate of the airflow passing through is adjusted according to the rotational speed of the impeller.
  • the four-way valve 18 connects the second port 18b and the third port 18c to each other and connects the first port 18a and the fourth port 18d to each other. Therefore, high-temperature and high-pressure refrigerant is supplied to the outdoor heat exchanger 16 from the discharge pipe 15 b of the compressor 15.
  • the refrigerant flows through the outdoor heat exchanger 16, the expansion valve 17, and the indoor heat exchanger 14 in order.
  • the outdoor heat exchanger 16 radiates heat from the refrigerant to the outside air.
  • the refrigerant is decompressed to a low pressure by the expansion valve 17.
  • the decompressed refrigerant absorbs heat from the surrounding air in the indoor heat exchanger 14. Cold air is generated. The cold air is blown out into the indoor space by the function of the blower fan 24.
  • the four-way valve 18 connects the second port 18b and the fourth port 18d to each other and connects the first port 18a and the third port 18c to each other.
  • a high-temperature and high-pressure refrigerant is supplied from the compressor 15 to the indoor heat exchanger 14.
  • the refrigerant flows through the indoor heat exchanger 14, the expansion valve 17, and the outdoor heat exchanger 16 in order.
  • the indoor heat exchanger 14 radiates heat from the refrigerant to the surrounding air. Warm air is generated. Warm air is blown into the indoor space by the function of the blower fan 24.
  • the refrigerant is decompressed to a low pressure by the expansion valve 17.
  • the decompressed refrigerant absorbs heat from the surrounding air in the outdoor heat exchanger 16. Thereafter, the refrigerant returns to the compressor 15.
  • FIG. 2 schematically shows the appearance of the indoor unit 12 according to an embodiment.
  • An outer panel 27 covers the main body 26 of the indoor unit 12.
  • An air outlet 28 is formed on the lower surface of the main body 26.
  • the blower outlet 28 is opened toward the room.
  • the main body 26 can be fixed to an indoor wall surface, for example.
  • the blower outlet 28 blows out the cool air or the warm air generated by the indoor heat exchanger 14.
  • a pair of front and rear wind direction plates 31a and 31b are arranged at the outlet 28.
  • the up-and-down wind direction plates 31a and 31b can rotate around the horizontal axes 32a and 32b, respectively.
  • the vertical airflow direction plates 31a and 31b can open and close the air outlet 28 according to the rotation. The direction of the airflow to be blown out is changed according to the angle of the up / down airflow direction plates 31a, 31b.
  • a suction port 33 is formed in the main body 26.
  • the suction port 33 opens at the front and top surfaces of the main body 26.
  • the outer panel 27 can be covered with the suction port 33 in front of the main body 26. Air flowing into the indoor heat exchanger 14 is taken in from the suction port 33.
  • a plurality of air filter assemblies 34 having the same shape are arranged in the suction port 33 in the longitudinal direction of the suction port 33.
  • the air filter assembly 34 includes an air filter 35 and a holding portion 36.
  • the air filter 35 is held by the holding unit 36.
  • the holding part 36 has a frame body 37.
  • the holding part 36 is fixed to the main body 26 by a frame body 37. When the holding portion 36 is set on the main body 26, the air filter 35 is disposed over the entire surface of the suction port 33.
  • the frame body 37 of the holding portion 36 is provided with a front filter rail 38 that holds a frame portion of an air filter 35 described later.
  • a rear filter rail 39 is provided on the main body 26 corresponding to the front filter rail 38.
  • the filter rails 38 and 39 are provided along a vertical plane orthogonal to the horizontal axes 32a and 32b so as to slidably hold the left and right ends of the air filter 35.
  • the air filter 35 moves along the filter rails 38 and 39.
  • the blower fan 24 is rotatably supported by the main body 26.
  • a cross flow fan is used as the blower fan 24.
  • the blower fan 24 rotates around a rotation shaft 41 parallel to the horizontal axis lines 32a and 32b.
  • the rotating shaft 41 of the blower fan 24 extends in the horizontal direction when the main body 26 is installed.
  • the blower fan 24 is disposed in parallel with the air outlet 28.
  • a driving force around the rotary shaft 41 is transmitted to the blower fan 24 from a driving source (not shown).
  • the drive source is supported by the main body 26.
  • the airflow passes through the indoor heat exchanger 14 according to the rotation of the blower fan 24. As a result, a cold or warm air stream is generated. Cold air or warm air is blown out from the air outlet 28.
  • the indoor heat exchanger 14 includes a front side body 14a and a rear side body 14b.
  • the front body 14 a faces the blower fan 24 from the front side of the blower fan 24.
  • the rear body 14 b is opposed to the blower fan 24 from the rear side of the blower fan 24.
  • the front body 14a and the rear body 14b are connected to each other at the upper end.
  • the front side body 14a and the rear side body 14b have a refrigerant pipe 42a.
  • the refrigerant pipe 42a reciprocates in the horizontal direction.
  • the refrigerant pipe 42a extends parallel to the horizontal axes 32a and 32b, is folded at the left and right ends of the main body 26 when viewed from the front, extends again parallel to the horizontal axes 32a and 32b, and is folded again at the left and right ends of the main body 26 when viewed from the front. These are repeated.
  • the refrigerant pipe 42 a constitutes a part of the second circulation path 22.
  • a plurality of heat radiation fins 42b are coupled to the refrigerant pipe 42a.
  • the radiating fins 42b spread in parallel to each other while being orthogonal to the horizontal axes 32a and 32b.
  • the refrigerant pipe 42a and the heat radiation fin 42b can be formed from a metal material such as copper or aluminum. Heat exchange is realized between the refrigerant and the air through the refrigerant pipe 42a and the radiation fins 42b.
  • the air filter assembly 34 includes a filter cleaning unit 43 and an electric dust collecting unit (electric dust collecting device) 44.
  • the filter cleaning unit 43 includes an upper dust box 45 and a lower dust box 46.
  • the upper dust box 45 and the lower dust box 46 have a frame 37 of the holding portion 36.
  • the upper dust box 45 is disposed on the front side of the air filter 35.
  • the upper dust box 45 has a cover 47.
  • the cover 47 is provided so as to cover the dust storage part 49 of the box body 48 so as to be openable and closable.
  • the lower dust box 46 is disposed on the rear surface side of the air filter 35.
  • the upper dust box 45 and the lower dust box 46 are arranged in the horizontal direction with respect to the air filter 35.
  • the filter cleaning unit 43 includes a first driven gear 51 and a second driven gear 52.
  • the first driven gear 51 is attached to the upper dust box 45.
  • the first driven gear 51 rotates around the horizontal axis 53.
  • the first driven gear 51 rotates a cleaning brush 66 described later in the upper dust box 45.
  • the teeth of the first driven gear 51 are partially exposed from the outer surface of the upper dust box 45.
  • the second driven gear 52 is attached to the lower dust box 46.
  • the second driven gear 52 rotates around the horizontal axis 54.
  • the second driven gear 52 is provided on both ends of the lower dust box 46 and drives an air filter 35 described later.
  • the teeth of the second driven gear 52 are partially exposed from the outer surface of the lower dust box 46.
  • the first driven gear 51 meshes with a first drive gear (not shown) mounted on the main body 26, and similarly, the second driven gear 52 is mounted on the main body 26. Engage with two drive gears (not shown).
  • a drive source such as an electric motor is individually connected to each drive gear.
  • the first driven gear 51 and the second driven gear 52 rotate individually according to the driving force supplied from the individual driving sources.
  • the electric dust collection unit 44 includes an ionizer 55, a dust collection electrode described later, and a repulsion electrode described later.
  • the ionizer 55 is provided in the upper dust box 45.
  • the casing 56 of the ionizer 55 may be provided integrally with the cover 47 of the upper dust box 45.
  • the casing 56 of the ionizer 55 is formed with openings 57 in the vertical direction. Ions and ozone are released from the opening 57. The released ions and ozone are dispersed in the space between the outer panel 27 and the air filter 35.
  • the ionizer 55 is electrically connected to a control unit (not shown) in the main body 26 by wiring (not shown).
  • the wiring of the ionizer 55 has a detachable electrical contact. When the air filter assembly 34 is attached and detached, the wiring is connected and disconnected. Operating power is supplied to the ionizer 55 through the wiring.
  • the air filter 35 includes a frame 61 and a mesh sheet 62.
  • the mesh sheet 62 is configured by combining polyethylene terephthalate fibers (resin fibers) in a lattice pattern, for example.
  • the mesh sheet 62 is supported by the frame 61.
  • the frame 61 has a function of holding the shape of the mesh sheet 62.
  • the frame 61 is formed from a resin material (for example, polypropylene).
  • the frame 61 and the mesh sheet 62 constitute a first insulator 63.
  • the mesh of the mesh sheet 62 is provided so as to intersect the airflow, and defines a ventilation path.
  • a rack 64 is formed on the frame 61 of the air filter 35.
  • the rack 64 is provided on a pair of opposing frame portions of the frame 61.
  • the rack 64 meshes with a pinion (not shown) stored in the lower dust box 46.
  • the pinion is connected to the second driven gear 52.
  • the rotation of the second driven gear 52 is transmitted to the pinion.
  • the air filter 35 moves back and forth along the filter rails 38 and 39.
  • the air filter 35 moves relative to the upper dust box 45 and the lower dust box 46.
  • a conductive material film 65 is formed on the surface (rear surface) on the downstream side of the air flow of the air filter 35.
  • a metal material such as aluminum can be used as the conductive material.
  • the coating 65 is laminated on the surface of the mesh sheet 62 on the surface of the air filter 35 on the side of the repulsive electrode 74 described later.
  • a sputtering method may be used to form the film 65.
  • the air passages partitioned in a lattice shape by the mesh sheet 62 are secured as they are.
  • An insulating material is maintained on one surface of the air filter 35 on the indoor side (front surface).
  • the coating 65 is connected to the ground of the main body 26.
  • the main body 26 may be provided with an electrical contact (not shown) that contacts a part of the coating 65.
  • the potential of the film 65 from the contact point may be dropped to the ground.
  • An electrical contact that contacts the coating 65 may be formed on the frame 37 of the holding portion 36, and in that case, a wiring extending from the contact of the frame 37 may be connected to the contact on the main body 26.
  • the filter cleaning unit 43 includes a cleaning brush 66.
  • the cleaning brush 66 is stored in the upper dust box 45.
  • the cleaning brush 66 includes a brush pedestal 67.
  • the brush pedestal 67 can rotate around the horizontal axis 68 by the driving force from the first driven gear 51.
  • the brush bristles 69 are arranged on a cylindrical surface of the brush pedestal 67 over a predetermined center angle range.
  • the flocking range of the brush bristles 69 has a spread across the air filter 35 in the axial direction of the brush pedestal 67.
  • the cleaning brush 66 brings the bristles 69 into contact with the air filter 35 at a predetermined rotational position, and separates the bristles 69 from the air filter 35 at other than the rotational position.
  • the filter cleaning unit 43 includes a brush receiver 71.
  • the brush receiver 71 is accommodated in the lower dust box 46.
  • the brush receiver 71 has a receiving surface 72.
  • the receiving surface 72 is opposed to the cleaning brush 66. When the bristle 69 contacts the air filter 35, the receiving surface 72 sandwiches the air filter 35 between the bristle 69.
  • brush hair may be planted on the receiving surface 72.
  • the ionizer 55 of the electric dust collection unit 44 has a charging electrode 73.
  • the ionizer 55 is supplied with high voltage power from the charging electrode high voltage power supply 59 of the main body 26 and is discharged into the air. Ions and ozone are generated by the discharge. The ions and ozone thus generated are emitted from the opening 57 of the ionizer 55.
  • the electric dust collection unit 44 further includes a repulsion electrode 74.
  • the repulsive electrode 74 only needs to generate an electric field that repels charged particles.
  • the repulsive electrode 74 may have the same structure as the air filter 35. That is, the repulsive electrode 74 includes a frame 75 and a mesh sheet 76.
  • the mesh sheet 76 is woven from polyethylene terephthalate fibers (resin fibers), for example.
  • the mesh sheet 76 is supported by the frame 75.
  • the frame 75 has a function of holding the shape of the mesh sheet 76.
  • the frame 75 is formed from, for example, polypropylene.
  • the frame 75 and the mesh sheet 76 constitute a second insulator 77.
  • the mesh of the mesh sheet 76 is provided so as to intersect the airflow, and defines a ventilation path.
  • the surface of the repulsive electrode 74 on the dust collecting electrode side (here, the air filter 35 side) is covered with a conductive material coating 78.
  • a metal material such as aluminum can be used as the conductive material.
  • the coating 78 is laminated on the surface of the second insulator 77 on the surface of the repulsive electrode 74 on the charging electrode 73 side.
  • a sputtering method may be used to form the film 78.
  • the partitioned ventilation path is secured as it is.
  • An insulating material (second insulator 77) is maintained on the rear surface of the repulsive electrode 74.
  • the repulsive electrode 74 may be fixed to the heat exchanger side of the filter rail 38 provided integrally with the lower dust box 46. A space is formed between the coating 78 on the front surface and the coating 65 of the air filter 35. That is, a distance is secured between the coating 78 and the coating 65. Here, the film 78 faces the film 65 at equal intervals. Thus, the electric dust collection unit 44 uses the air filter 35 as a dust collection electrode.
  • the coating 78 is connected to a high voltage power source 79 for the repulsive electrode of the main body 26.
  • the wiring connecting the repulsion electrode 74 and the high voltage power supply 79 for the repulsion electrode has a detachable electrical contact.
  • the air filter assembly 34 is attached and detached, the wiring is coupled and divided.
  • a high voltage is supplied to the coating 78 through the wiring.
  • a voltage having the same polarity as that of the charging electrode 73 is supplied to the coating 78 of the repulsive electrode 74. Therefore, the repulsive electrode 74 forms an electrical barrier having the same polarity as the charging electrode 73 along the front coating 78 upon receiving a high voltage.
  • Fine particles such as dust smaller than the size of the mesh adhere to the rear surface of the air filter 35 by the principle of electrostatic dust collection described later. In this way, dust and the like are removed from the airflow flowing toward the indoor heat exchanger 14. A clean airflow flows into the indoor heat exchanger 14. Cool air or warm air of clean air is blown out from the air outlet 28.
  • the operation of the filter cleaning unit 43 when the air filter 35 is cleaned will be described.
  • the bristle 69 of the cleaning brush 66 comes into contact with the front surface of the air filter 35 in accordance with the rotation operation of the brush base 67.
  • the rear surface of the air filter 35 is received by the receiving surface 72 of the brush receiver 71.
  • the air filter 35 is sandwiched between the bristle 69 and the receiving surface 72.
  • the second driven gear 52 is driven, the filter 35 moves back and forth along the filter rails 38 and 39.
  • the bristle 69 traces the front surface of the air filter 35.
  • the bristle 69 entangles large dust from the front surface of the air filter 35.
  • the entangled dust is collected in the upper dust box 45.
  • the charging electrode 73, the air filter 35 (dust collection electrode), and the repulsion electrode 74 are disposed in the airflow generated by the blower fan 24.
  • An air filter 35 is disposed downstream of the charging electrode 73 and a repelling electrode 74 is disposed downstream of the air filter 35 along the flow direction of the airflow.
  • the charging electrode 73 is discharged into an air current.
  • positive ions 81 are generated in the airflow by the discharge.
  • Positive ions 81 adhere to fine particles 82 such as dust in the airflow.
  • the fine particles 82 are positively charged (hereinafter, the charged fine particles are referred to as “charged fine particles 83”).
  • the surface of the mesh sheet 76 of the repelling electrode 74 is positively charged.
  • the positively charged mesh sheet 76 forms an electrical barrier 84 in a posture that intersects the flow direction of the airflow.
  • the electrical barrier 84 is orthogonal to the flow direction of the airflow.
  • the electrical barrier 84 is continuous along the surface of the mesh sheet 76.
  • the electrical barrier 84 has the same polarity as the charging electrode 73, that is, has a positive polarity.
  • the airflow passes through a region where the air passage is partitioned by the mesh of the mesh sheet 62. Since the charged fine particles 83 riding on the airflow are smaller than the mesh of the mesh sheet 62, the charged fine particles 83 pass through the mesh sheet 62 of the air filter 35. The charged fine particles 83 collide with the electrical barrier 84. Since the charged fine particles 83 and the electric barrier 84 have the same polarity, the charged fine particles 83 are rebounded by the electric barrier 84. As a result, the traveling speed of the charged fine particles 83 is reduced and the traveling direction is reversed, and the charged fine particles 83 move toward the air filter 35 and adhere to the coating 65.
  • the dust collection electrode and the repulsion electrode are formed in a mesh sheet shape, it is not necessary to provide an electrode in the length direction with respect to the flow path of the airflow. Therefore, dust can be removed without increasing the pressure loss due to the dust collector.
  • the coating 65 of the air filter 35 is connected to the ground 85.
  • the air filter 35 can be prevented from having the same polarity as that of the charging electrode 73. Even if the adhesion amount of the charged fine particles 83 increases, new charged fine particles 83 can reliably adhere to the air filter 35.
  • the polarity of the air filter 35 as the dust collecting electrode is the ground, it is only necessary to have the polarity to which the charged fine particles 83 are attached, and the polarity is opposite to the charged fine particles 83, that is, the negative polarity. It may be.
  • the coating 78 of the repulsive electrode 74 be opposed to the coating 65 of the air filter 35 at equal intervals.
  • the electric barrier 84 suppresses the uneven distribution of potential.
  • the charged fine particles 83 can uniformly adhere to the air filter 35.
  • the distance between the coating film 78 and the coating film 65 is not constant, there is a possibility that a spark occurs in an adjacent place.
  • the first insulator 63 receives the airflow on the front surface (first surface) and supports the coating film 65 on the rear surface (second surface opposite to the first surface).
  • the second insulator 77 supports the coating 78 on the surface facing the coating 65 of the air filter 35.
  • the coating film 78 on the repulsive electrode 74 faces the coating film 65 on the air filter 35.
  • the coating 65 of the air filter 35 and the coating 78 of the repulsive electrode 74 are disposed between the first insulator 63 and the second insulator 77. Thereby, it can prevent that a user contacts the coating film 78 to which a high voltage is supplied directly from the outside.
  • the surface coated with the metal material has less irregularities than the surface of the insulator (first insulator 63) made of a resin material. Therefore, the air filter 35 can be easily cleaned by setting the surface on which the charged fine particles 83 adhere to the repulsive electrode 74 side.
  • FIG. 9 schematically shows a configuration of an air cleaner 91 according to an embodiment of the present invention.
  • the air cleaner 91 includes a main body 92 and a front cover 93.
  • a front cover 93 is coupled to the front surface of the main body 92.
  • a housing space 94 is defined in the main body 92.
  • the accommodation space 94 is closed by the front cover 93.
  • the front cover 93 is formed with a front vent 95 connected to the accommodation space 94.
  • a rear vent 96 is formed on a wall surface facing the front cover 93.
  • a blower fan 97 is disposed in the rear vent 96. When the blower fan 97 is activated, air is taken into the accommodation space 94 from the front vent 95. Air flows from the accommodation space 94 into the rear vent 96. Air is discharged from the rear vent 96 to the outside. Thus, an air flow is generated from the front vent 95 toward the rear vent 96 in the accommodation space 94.
  • an electric dust collecting unit (electric dust collecting device) 98 is accommodated in the accommodating space 94.
  • the electric dust collection unit 98 includes a plurality of charging electrodes 99 on the windward side.
  • the charging electrode 99 may be formed vertically long along the left and right wall surfaces of the accommodation space 94. Airflow flows through the space between the charging electrodes 99. Due to the action of the charging electrode 99, fine particles such as dust in the air current are charged to a specific polarity.
  • the electric dust collection unit 98 includes a first air filter 101, a first repelling electrode 102, a second air filter 103, and a second repelling electrode 104.
  • the first air filter 101 and the second air filter 103 may be configured in the same manner as the air filter 35 described above. That is, a conductive material film is formed on the rear surface of the first insulator. The coating is connected to ground. The mesh of the mesh sheet is provided so as to intersect the airflow, and defines a ventilation path.
  • the first repulsion electrode 102 and the second repulsion electrode 104 may be configured in the same manner as the repulsion electrode 74 described above. That is, a conductive material film is formed on the front surface of the second insulator.
  • a high voltage power source is connected to the coating.
  • the mesh of the mesh sheet is provided so as to intersect the airflow, and defines a ventilation path.
  • the airflow sequentially passes through the charging electrode 99, the first air filter 101, the first repelling electrode 102, the second air filter 103, and the second repelling electrode 104.
  • the coating of the first repulsive electrode 102 faces the coating of the first air filter 101 at equal intervals.
  • the coating of the second repulsive electrode 104 is opposed to the coating of the second air filter 103 at equal intervals.
  • the first repulsive electrode 102 may function as a charging electrode with respect to the second repulsive electrode 104.
  • a voltage is applied so that positive ions are generated in the airflow by discharging from the first repulsive electrode 102 to the airflow. That's fine.
  • a charging electrode may be further disposed between the first repulsive electrode 102 and the second air filter 103.
  • fine particles such as dust are captured by the first air filter 101 and the second air filter 103 in the electric dust collection unit 98.
  • dust collection efficiency can be improved more by arranging a plurality of dust collection electrodes and repulsion electrodes with respect to air current.
  • the filter cleaning unit 43 may be combined with the first air filter 101 in the same manner as described above.
  • a HEPA filter 105 may be used instead of the second air filter 103 and the second repulsive electrode 104.
  • the HEPA filter 105 can capture fine particles passing through the first air filter 101 without being charged.
  • the electric dust collection unit 98 can function as a pre-filter for the HEPA filter 105. In that case, since the particulate matter is captured by the pre-filter, the replacement frequency of the HEPA filter 105 can be made lower than when the particulate matter is captured by the HEPA filter 105 alone.
  • FIG. 11 schematically shows a configuration of a ventilator 107 according to an embodiment of the present invention.
  • the ventilation device 107 includes a housing 108.
  • An electric dust collection unit (electric dust collector) 109 and a blower fan 111 are accommodated in the housing 108.
  • the electrostatic dust collection unit 109 includes a charging electrode 112, a first air filter 113, a first repelling electrode 114, a second air filter 115 and a second repelling electrode 116.
  • the charging electrode 112, the first air filter 113, the first repulsion electrode 114, the second air filter 115, and the second repulsion electrode 116 function in the same manner as described above.
  • the airflow sequentially passes through the charging electrode 112, the first air filter 113, the first repulsive electrode 114, the second air filter 115, and the second repelling electrode 116. Fine particles in the airflow are captured by the first air filter 113 and the second air filter 115.
  • a ventilator 107 may be installed in an air duct that interconnects the room and the outdoors. When introducing outside air, it can capture fine particles such as dust in the air.
  • FIG. 12 schematically shows the configuration of the clean room 118 according to an embodiment of the present invention.
  • the room 119 is constituted by a sealed space.
  • An air duct 121 is connected to the room 119.
  • the air duct 121 opens at a first position in the room 119 and opens at a second position away from the first position.
  • the above-described ventilator 107 may be incorporated in the air duct 121. Air circulates through the air duct 121. Air is purified by the ventilator 107 for each circulation.

Abstract

　L'invention concerne un électrofiltre qui peut piéger efficacement des microparticules tout en évitant une perte de pression. L'électrofiltre est pourvu d'une électrode de charge (73), d'une électrode de collecte de poussière (35), et d'une électrode répulsive (74). Le long de la direction de l'écoulement d'air, l'électrode de collecte de poussière (35) est disposée en aval de l'électrode de charge (73), et l'électrode répulsive (74) est disposée en aval de l'électrode de collecte de poussière (35). L'électrode de collecte de poussière (35) est formée d'un matériau électroconducteur qui divise les passages d'air qui passent au travers dans la direction du flux d'air. L'électrode répulsive (74) forme une barrière électrique de la même polarité que l'électrode de charge (73), dans une orientation coupant la direction du flux d'air.
PCT/JP2015/056636 2014-03-07 2015-03-06 Électrofiltre et climatiseur utilisant celui-ci WO2015133602A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP15758131.5A EP3115113A4 (fr) 2014-03-07 2015-03-06 Électrofiltre et climatiseur utilisant celui-ci
US15/112,335 US20160332169A1 (en) 2014-03-07 2015-03-06 Electric dust collection device and air conditioner using the same
CN201580006003.9A CN105934279B (zh) 2014-03-07 2015-03-06 静电集尘装置以及利用该静电集尘装置的空调设备

Applications Claiming Priority (4)

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JP2014045683A JP6012652B2 (ja) 2014-03-07 2014-03-07 電気集塵装置並びにそれを利用した空気調和機
JP2014-045682 2014-03-07
JP2014045682A JP6012651B2 (ja) 2014-03-07 2014-03-07 電気集塵装置並びにそれを利用した空気調和機
JP2014-045683 2014-03-07

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WO2017207382A1 (fr) * 2016-05-31 2017-12-07 Koninklijke Philips N.V. Purification d'air intelligente

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CN112413811A (zh) * 2020-11-26 2021-02-26 珠海格力电器股份有限公司 一种除尘装置、换热器、空调器及空调换热器的除尘方法
CN112915411A (zh) * 2021-01-26 2021-06-08 武汉轩瑞佳商务咨询有限公司 一种胸外科呼吸机用空气净化系统
FR3121493A1 (fr) * 2021-04-06 2022-10-07 Akwel Dispositif électrostatique de récupération de particules de poussières de freinage.

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CN105934279B (zh) 2018-11-16
CN105934279A (zh) 2016-09-07
US20160332169A1 (en) 2016-11-17
EP3115113A1 (fr) 2017-01-11

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